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Orage vs KOrganizer: catalog facts
Orage	KOrganizer
Free Free and open source as part of the Xfce project.	Free Free and open source from the KDE community.
Linux	Linux
Light on resources Uses the standard iCal format with import and export	Works with Nextcloud, Kolab, Google Calendar and CalDAV servers Integrated to-dos alongside the agenda view
Single user only, no group calendars Linux desktop only	Best suited to the KDE Plasma desktop Depends on the Kontact/Akonadi stack
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.